JP2632848B2 - Anti-fog sheet - Google Patents

Description

Description: FIELD OF THE INVENTION The present invention relates to an antifogging sheet for imparting antifogging properties to surfaces of articles such as automobile windows and side mirrors, home mirrors and bathroom windows. .

[Related Art] Conventionally, as an antifogging layer for imparting antifogging properties to the surface of an article, (a) those having a fogging resistance by kneading a surfactant into a resin, (b) colloidal silica or phos Examples include those in which an inorganic salt such as phyt is added to extend the antifogging life, and (c) those in which the surface is made hydrophilic by modifying the polymer such as saponification of acetyl cellulose.

[Problems to be Solved by the Invention] However, the antifogging layer (a) has a problem that the antifogging life is short due to early leaching of the surfactant. Further, the antifogging layer (b) has a problem that the life of the antifogging property is short due to early leaching of the surfactant. (C)
The antifogging layer has a problem in that the film strength when wet is poor, and the antifogging property is deteriorated due to being damaged at the time of application.

In view of the above problems, an object of the present invention is to provide an antifogging sheet that has solved the above problems of the conventional technology.

[Means for Solving the Problems] As a result of intensive studies in view of the above-mentioned object, by forming the anti-fog layer of the anti-fog sheet by electron beam irradiation,
The present inventors have discovered that good and durable antifogging properties can be imparted, and have reached the present invention.

That is, the antifogging sheet of the present invention has a support film and an antifogging layer, and the antifogging layer is obtained by crosslinking a polymer and a hydrophilic monomer by electron beam irradiation, and contains a surfactant. It is characterized by doing.

The antifogging sheet of the present invention is the simplest one in which an antifogging layer is formed on a support film.However, if necessary, an adhesive layer is formed on the back surface of the support film, or the support film and the antifogging layer are A printing layer can be provided between them.

Support Film As the support film, various materials can be used depending on the use as long as the support film has sufficient mechanical strength to support the antifogging layer. Specific examples include films, sheets, boards, and the like of polyesters such as polyethylene terephthalate, polyolefins such as polyethylene and polypropylene, polyamides such as nylon, and synthetic resins such as polycarbonate, polyacrylate, polystyrene, and polyvinyl chloride. These can be laminated and used as needed.

The support film may be colored in various colors as needed. As the colorant, a disperse dye is preferable, and disperse dyes such as monoazo, bisazo, anthraquinone, nitro, styryl, methine, alylene, benzimidazole, aminonaphthylamide, naphthoquinone imide, and coumarin derivative can be used.

Anti-fogging layer The anti-fogging layer basically comprises a polymer in which a hydrophilic monomer or the like is crosslinked by irradiation with an electron beam and a surfactant is contained. Specific combinations include (a) polymer + hydrophilic monomer + surfactant, (b) polymer + hydrophilic monomer + crosslinking monomer + surfactant, (c) polymer + hydrophilic crosslinking monomer + surfactant (D) polymer + hydrophilic monomer + hydrophilic cross-linkable monomer + surfactant. In all of the above combinations, the polymer may be either a functional polymer or a non-functional polymer.

Non-functional polymers include polyacrylic acid alkyl ester, polymethacrylic acid alkyl ester, polyurethane, polyester, polyamide, polyvinyl acetate, polyvinyl chloride, polystyrene, polyacrylonitrile,
Polyvinylpyrrolidone and the like can be used.

A hydrophilic group may be previously introduced into the non-functional polymer in order to improve the compatibility with the hydrophilic monomer. This is a copolymer with a monomer having a hydrophilic group (hydrophilic monomer) described later. The ratio of the hydrophilic monomer to the non-functional polymer is 50 mol% or less, and when it exceeds this, the water resistance of the obtained film is reduced.

Furthermore, partially saponified polyvinyl alcohol, polyvinyl butyral, polyvinyl alcohol derivatives such as polyvinyl acetal, and cellulose derivatives such as nitrocellulose, cellulose acetate, cellulose acetate butyrate, cellulose acetate propionate, and hydroxypropyl cellulose can also be used. .

On the other hand, the functional polymer is a polymer having a functional group that causes a crosslinking reaction by ionizing radiation, and examples of the functional group include the following.

Allyl group -CH ₂ -CH = CH ₂ The ratio of the functional group is desirably one in the molecular weight of 300 to 10,000 of the polymer. When the ratio is less than one per 10,000 molecular weight, there is almost no crosslinking effect by the functional group, and when the ratio exceeds one per 300 molecular weight, the crosslink density is higher. Is too high.

Examples of the functional polymer include urethane acrylate, polyester acrylate, epoxy acrylate and the like, and acrylic acid chloride or 2-hydroxyethyl acrylate and diisocyanate at the hydroxyl group of a copolymer of alkyl acrylate and 2-hydroxyethyl acrylate. A copolymer in which an acryloyl group is introduced by adding a 1: 1 adduct of acrylic acid, a copolymer in which glycidyl methacrylate is added to a carboxyl group of a copolymer of an alkyl acrylate and acrylic acid, and a residual polyvinyl butyral Acrylic acid chloride or acrylic acid-2 in hydroxyl group
A product obtained by adding a 1: 1 adduct of -hydroxyethyl and diisocyanate can be used.

The polymer may be in an oligomer form, but preferably has a molecular weight of 1,000 to 300,000 (weight average) from the viewpoint of film forming properties.

The hydrophilic monomer is a monomer containing a hydrophilic group such as a hydroxyl group, a carboxyl group (metal salt), an amide group, an imide group, a sulfone group, an ammonium base, and a phosphoric acid group. For example, 2-hydroxyethyl acrylate, methacrylic acid 2-hydroxyethyl, 2-hydroxypropyl acrylate, 2-hydroxypropyl methacrylate, acrylic acid, methacrylic acid, metal acrylate, metal methacrylate, acrylamide, methacrylamide, dimethylaminopropyl acrylamide, dimethylaminopropyl methacrylamide , N-acryloylmorpholine, N-methacryloylmorpholine, N-methylolacrylamide, N-methylolmethacrylamide, t
-Butylacrylamide, t-butylmethacrylamide, N-methoxymethylacrylamide, N-ethoxymethylacrylamide, Nn-butoxyacrylamide, N, N-dimethylacrylamide, N, N-dimethylaminopropylacrylamide, N, N-dimethyl Aminopropyl methacrylamide, polyethylene glycol monomethacrylate, polypropylene glycol monomethacrylate, glycerol monomethacrylate, 2-acrylamide 2-methylpropanesulfonic acid, methacrylamidopropyltrimethylammonium chloride, methacryloyloxyethyltrimethylammonium chloride, mono (2-methacryloxy) Ethyl) acid phosphate and the like.

The crosslinkable monomer is a monomer having two or more groups that easily become a radical by electron beam irradiation such as an acrylloyl group, a methacryloyl group, an allyl group, and an epoxy group, and is cross-linked to any of the skeleton polymer and the hydrophilic monomer. The crosslink density of the entire film is improved, the film strength is increased, and unreacted hydrophilic monomers are not left. As such a crosslinkable monomer, ethylene glycol dimethacrylate, diethylene glycol dimethacrylate, 1,6-hexanediol dimethacrylate,
Glycidyl methacrylate, neopentyl glycol dimethacrylate, tetraethylene glycol dimethacrylate, 2,2-bis [4- (acryloxydiethoxy)
Phenyl] propane, 2,2-bis [4- (methacryloxydiethoxy) phenyl] propane, 2,2-bis [4-
(Acryloxypolyethoxy) phenyl] propane, 2,
Bifunctional monomers such as 2-bis [4- (methacryloxypolyethoxy) phenyl] propane, trifunctional monomers such as trimethylolpropane trimethacrylate, and other functional monomers such as tetramethylol methane tetraacrylate and dipentaerythritol hexaacrylate Is mentioned.

Hydrophilic crosslinkable monomers include a hydroxyl group, a carboxyl group (metal salt), an amide group, an imide group, a sulfonic acid group (metal salt), an ammonium group, a phosphoric acid group, and other hydrophilic groups and acryloyl, methacryloyl, and allyl groups. And a monomer having two or more crosslinkable functional groups that easily become radicals upon irradiation with an electron beam such as an epoxy group.

Examples of such a hydrophilic crosslinkable monomer include those having a hydroxyl group such as glycerol di (meth) acrylate and glycerol methacrylate acrylate, ethylene glycol, diglycidyl ether di (meth) acrylate, and polyethylene glycol diglycidyl ether di (meth) acrylate. A) acrylate, polypropylene glycol diglycidyl ether di (meth) acrylate, neopentyl glycol diglycidyl ether di (meth) acrylate, glycerin diglycidyl ether di (meth) acrylate, bisphenol A diglycidyl ether di (meth) acrylate, tri Methylolpropane triglycidyl ether di (meth) acrylate and other diols / diglycidyl ethers and acrylic acid 1:
2 adducts, pentaerythritol mono (meth) acrylate, pentaerythritol di (meth) acrylate,
Pentaerythritol tri (meth) acrylate, dipentaerythritol mono (meth) acrylate, dipentaerythritol di (meth) acrylate, dipentaerythritol tri (meth) acrylate, dipentaerythritol tetra (meth) acrylate, dipentaerythritol penta Pentaerythritol derivatives such as (meth) acrylate, methylenebis (meth) acrylamide, acrylamide / glyoxal adduct, acrylamide / methyloethylene urea condensate, 1,3,5-triacryloylhexahydros-triazine, N, N-diallylacrylamide, Acrylamide / methylol melamine condensate, acrylamide / methylol triazone condensate, acrylamide / methylol hydantoin condensate,
There are acrylamide derivatives such as acrylamide / methylol urea and N, N-diallylacrylamide.

The anti-fog layer of the present invention also contains a surfactant. The surfactant has an effect of imparting anti-fogging properties by gradually oozing out from the hydrophilic film to the surface. Any of anionic, nonionic and cationic surfactants can be used as long as they have good compatibility with the composition comprising the above components constituting the antifogging layer.

Examples of anionic surfactants include fatty acid salts, alkyl sulfate salts, alkyl benzene sulfonates, alkyl naphthalene sulfonates, dialkyl sulfosuccinate esters, alkyl phosphate esters, naphthalene sulfonic acid-formalin condensates, and polyoxyethylene. Alkyl sulfates, etc., and nonionic surfactants include polyoxyethylene alkyl ether, polyoxyethylene alkyl phenol ether, polyoxyethylene fatty acid ester, sorbitan fatty acid ester, polyoxyethylene sorbitan fatty acid ester, polyoxyethylene alkylamine Glycerin fatty acid esters, oxyethylene-oxypropylene block polymers, etc., and cationic surfactants include alkylamines and quaternary ammonium. There is salt, and the like.

When forming the anti-fog layer of the present invention, 5-200 parts by weight of the hydrophilic monomer is added per 100 parts by weight of the polymer. If the amount is less than 5 parts by weight, sufficient hydrophilicity will not be provided, and if it exceeds 200 parts by weight, the film and the water resistance will decrease. The preferred content of the hydrophilic monomer is 20 to 150 parts by weight.

The crosslinking monomer is used in an amount of 1 to 300 parts by weight per 100 parts by weight of the polymer. If the amount is less than 1 part by weight, the unreacted hydrophilic monomer is insufficiently crosslinked, and if it exceeds 300 parts by weight, the crosslink density of the whole film becomes too high. Particularly when the polymer has no functional group, the content of the crosslinkable monomer is preferably from 5 to 300 parts by weight, more preferably from 5 to 200 parts by weight. When the polymer has a functional group, the content of the crosslinkable monomer is preferably 1 to 200 parts by weight, more preferably 5 to 100 parts by weight.

The amount of the hydrophilic crosslinkable monomer is 1 per 100 parts by weight of the polymer.
~ 200 parts by weight. If the amount of the polymer is less than 100 parts by weight, sufficient hydrophilicity and cross-linking property will not be imparted. Conversely, if the amount is more than 200 parts by weight, the water resistance of the film will decrease and the cross-linking density will be too high. The preferred content of the hydrophilic crosslinkable monomer is 1 to 10
0 parts by weight.

The surfactant is not more than 100 parts by weight per 100 parts by weight of the polymer. If it exceeds 100 parts by weight, the leaching of the surfactant becomes too much. The preferred content is 1 to 50 parts by weight.

When forming an antifogging layer, a composition comprising an appropriate combination of the above components is appropriately mixed with a solvent. The solvent is preferable for forming the anti-fog layer of the present invention because it not only regulates the fluidity of the composition but also has the function of causing the hydrophilic monomer to float on the surface of the coating film. Solvents that can be used include alcohols such as methanol, ethanol, isopropanol, methyl cellosolve, and ethyl cellosolve,
Ethers such as tetrahydrofuran, ketones such as methyl ethyl ketone, acetone and methyl isobutyl ketone,
Esters such as ethyl acetate and butyl acetate; aromatic hydrocarbons such as toluene and xylene; and a mixed solvent thereof.

The amount of the solvent to be added depends on the method of forming the film, but when the coating is formed by coating, the solid content in the composition is adjusted to 5 to 50% by weight, preferably 5 to 30% by weight. Generally, the amount of the solvent to be added is 600 parts by weight or less per 100 parts by weight of the polymer.

An antifogging layer can be formed by the following method using a composition comprising the above components.

First, the composition adjusted to an appropriate viscosity is applied to the surface of the support film by a roll coating method such as a gravure reverse method, a three-reverse method, a gravure direct method, or a four-reverse method. The coating film of the composition formed on the supporting film is dried while heating with a drier or the like in order to remove the solvent by evaporation. If the heating temperature is too high, the monomers will also evaporate.

In the antifogging layer formed as described above, it was found that the monomer floated on the surface and tended to be composed of a monomer-rich phase and a polymer-rich phase. This is an important feature of the present invention. That is, a relatively large number of hydrophilic groups are present on the surface due to such “orientation”,
An antifogging layer supported by a polymer skeleton having water resistance, mechanical strength, and the like is obtained. Next, the anti-fog layer is irradiated with an electron beam. As an irradiation method, any method such as an electron curtain method and a beam scanning method can be used. Upon irradiation with an electron beam, the polymer becomes crosslinkable, with or without functional groups, and the monomer is crosslinked to the polymer in the form of graft polymerization or block polymerization. This is a remarkable difference from the crosslinking by irradiation with ultraviolet rays. The energy of the electron beam for irradiation is about 150 to 200 keV, and the amount of irradiation varies depending on the composition of the composition, the desired degree of crosslinking density, and the like. The more the polymer has a functional group and the more the crosslinkable monomer, the smaller the irradiation dose is. The higher the crosslink density, the higher the irradiation dose. In particular, if the cross-linking density is too high, the bleeding of the surfactant becomes insufficient and the anti-fogging effect is reduced, so that the control of the irradiation amount is important.

From the above, the irradiation dose is generally 0.5 to 20 Mrad,
If it is less than 0.5 Mrad, unreacted monomers may remain. If it exceeds 20 Mrad, the crosslink density becomes too high.

The antifogging layer thus formed has a polymer skeleton in which a hydrophilic monomer and / or a hydrophilic crosslinkable monomer is crosslinked, and a hydrophilic group of the hydrophilic monomer and / or the hydrophilic crosslinkable monomer on the layer surface. It has a unique structure of being concentrated. Therefore, it has good antifogging properties. Since the entire upper layer is crosslinked, it has sufficient hardness and strength.

Because of the hydrophilic groups present on the surface, the composition has excellent antifogging properties, particularly in applications where water vapor is applied for a short period of time.

For those that are used for long-term exposure to water vapor, the surface active groups exhibit the initial anti-fog properties because they contain a surfactant, and the surfactant present in the layer is It exudes to the surface due to the moisture attached to the surface and exhibits long-term anti-fog properties. Here, since the antifogging layer of the present invention is crosslinked, the leaching of the surfactant is gradual, and the antifogging property can be maintained for a very long time. In addition, the bleeding rate of the surfactant can be controlled by adjusting the crosslinking density by changing the irradiation conditions of the electron beam.

The thickness of the anti-fog layer is 0.5 to 30 μm, preferably 1 to 10 μm
It is.

The anti-fog layer may also contain various colorants as needed. The same coloring agent as that used for the support film can be used. In order to further improve the weather resistance, an ultraviolet absorber can be added to the anti-fog layer, and for example, a benzotriazole-based ultraviolet absorber can be used.

Note that an adhesive layer may be appropriately provided between the anti-fog layer and the support film.

Adhesive layer To attach the anti-fog sheet to glass, mirror, etc.
An adhesive layer can be provided on the back surface of the support film.

Known adhesives can be used, for example, SB
Any pressure-sensitive adhesive such as R-based, natural rubber-based, solvent-based acrylic resin, emulsion-based acrylic resin, butyl rubber-based, isobutyl rubber-based thermoplastic elastomer (hot melt), and silicone-based can be used.

These resins are diluted as necessary to have a viscosity suitable for coating, and then coated by a known coating method, for example, reverse roll coating, roll coating, gravure coating, kiss coating, plate coating, smooth coating, or the like.

The thickness of the adhesive layer is generally from 10 to 30 μm, preferably from 15 to 30 μm. Further, an ultraviolet absorber can be added to the pressure-sensitive adhesive layer to improve weather resistance.

Printing layer The printing layer is for giving a printed pattern to an article by attaching an antifogging sheet. The printing layer is usually provided between the support film and the anti-fog layer, and the type of ink may be determined in consideration of the application and the structure of the anti-fog sheet. Normal ink is
It is kneaded in a vehicle using a pigment or dye coloring agent, a plasticizer, a stabilizer, other additives or a solvent or diluent.

Among the components of the ink, as a binder related to adhesiveness, a homopolymer of acrylic or methacrylic monomer such as poly (methyl methacrylate), poly (ethyl methacrylate), poly (ethyl acrylate), and poly (butyl acrylate) or these monomers may be used. Preferably used is one or more alcohol-insoluble resins such as copolymers, styrene resins such as polystyrene and poly-α-styrene, and styrene copolymer resins, cellulose acetate, vinyl chloride, and polyester resins. I do.

 In addition to the above, the following layers can be provided as appropriate.

Metal thin film layer To give a metallic appearance to the surface of the anti-fog sheet,
A metal thin film layer may be provided. Materials for forming the metal thin film layer include aluminum, chromium, tin, silver, copper, and gold, and the thickness is usually about 400 to 600 mm. The metal thin film layer can be formed in a pattern as required. This metal thin film layer is formed by vapor deposition, sputtering, plating, or the like.

Heat ray reflective layer (a) Dyeing or coating of pigments and dyes,
(B) A thin film formed by vapor deposition or sputtering of aluminum, copper, silver, etc .; (c) a thin film formed by sputtering or coating of ceramic such as aluminum titanate;

In addition, a coloring layer may be separately provided, or a protective layer of polypropylene or polyester may be provided.

[Example] Fig. 1 shows a preferred example of the antifogging sheet of the present invention. 1 is a support film and 2 is an anti-fog layer. FIG. 2 shows another embodiment, wherein 1 and 2 are the same as in FIG. 1, and 3 is an adhesive layer. FIG. 3 shows still another embodiment, in which 1, 2,
3 is the same as FIG. 2, and 4 is a printing layer. FIG. 4 shows still another embodiment, in which 1, 2, and 3 are the same as in FIG.
Is an aluminum deposition layer, and 10 is a release sheet. FIG. 5 shows still another embodiment, in which 1, 2, 3, 5, and 10 are the same as in FIG. 4, and 7 is a vapor deposition layer. FIG. 6 shows still another embodiment.
1, 2, 3, 7, and 10 are the same as in FIG. 5, 6 is a heat ray reflective layer, 9
Is a protective layer. FIG. 7 shows still another embodiment, in which 1,2,3,
10 is the same as FIG. 4, and 8 is a colored layer.

Next, the present invention will be described in more detail with reference to specific examples.

Examples 1 to 5 and Comparative Examples 1 to 4 A polyester film (Lumilar T-60, manufactured by Toray Industries, Inc., 38 μm in thickness) was used as a support film, and a composition having a composition shown in Table 1 below was applied to one surface thereof. It was applied with a roll coater and dried with a drier to form an anti-fogging film having a thickness of 8 μm. Next, an electron beam of 175 KeV was irradiated with 5 Mrad by an electron curtain type EB device (manufactured by ESI) to cure the film.

The acrylic polymer solution was prepared according to the following procedure. That is, 700 parts by weight of methyl methacrylate, 2
-Hydroxyethyl methacrylate 390 parts by weight, azobisisobutyronitrile 1.5 parts by weight and methylcellosolve 2
210 parts by weight were placed in a separable flask equipped with a reflux tube and a stirrer and purged with nitrogen, and reacted at 85 ° C. for 5 hours in a N ₂ stream. Thereafter, 1.5 parts by weight of azobisisobutyronitrile was further added and reacted for 3 hours. The resulting acrylic polymer solution had a concentration of 33% by weight and had a weight average molecular weight (w) of 7.5 × 10 ^{4 as} measured by gel permeation chromatography (GPC). No monomer peak was observed.

Further, an acrylic pressure-sensitive adhesive layer was applied to the back of the support film so as to have a dry thickness of 25 μm to obtain an antifogging sheet.

The obtained antifogging sheet was attached to a glass plate having a thickness of 2 mm, and the following antifogging test was performed.

(1) Water contact angle test.

(2) Expiration test (check whether or not expiration causes fogging). ：: no fogging occurred, x: fogging occurred.

(3) Ice-water breath test (a film is attached to a beaker containing ice-water, and one minute later, breathing is performed to check whether clouding occurs). ：: no fogging occurred, x: fogging occurred.

(4) 60 ° C steam test (examine the film at 60 ° C steam to see if fogging occurs).

：: No fogging (1 minute) Δ: Fogging in 1 minute ×: Immediate fogging The results are shown in Table 2 below.

As described above, the article to which the antifogging sheet of the present invention was adhered exhibited good antifogging properties.

[Effect of the Invention] Since the antifogging sheet of the present invention has the antifogging layer having the above configuration, it has good antifogging properties and a long life. Further, since it can be easily attached to articles of various shapes, it is convenient to impart anti-fogging property. Therefore, the antifogging sheet of the present invention can be effectively used for windows and mirrors of automobiles, and mirror windows for home use, particularly bathrooms.

[Brief description of the drawings]

FIG. 1 is a cross-sectional view of an anti-fogging sheet according to one embodiment of the present invention, FIG. 2 is a cross-sectional view of an anti-fogging sheet according to another embodiment of the present invention, and FIG. It is sectional drawing of the antifogging sheet by further another Example. FIG. 4 is a sectional view of an anti-fogging sheet according to still another embodiment of the present invention, FIG. 5 is a cross-sectional view of an anti-fogging sheet according to still another embodiment of the present invention, and FIG. FIG. 7 is a cross-sectional view of an anti-fogging sheet according to still another embodiment of the present invention, and FIG. 7 is a cross-sectional view of an anti-fogging sheet according to still another embodiment of the present invention. DESCRIPTION OF SYMBOLS 1 ... Support sheet 2 ... Anti-fog layer 3 ... Adhesive layer 4 ... Printing layer 5 ... Aluminum deposition layer 6 ... Heat ray reflective layer 7 ... Adhesive layer 8 ... Coloring layer 9 ... Protective layer 10 ... … Release sheet

Claims (10)

(57) [Claims] 1. An antifogging sheet having a support film and an antifogging layer, wherein the antifogging layer is obtained by crosslinking a polymer and a hydrophilic monomer by electron beam irradiation, and contains a surfactant. An anti-fog sheet characterized by the following. 2. The anti-fogging sheet according to claim 1, wherein said anti-fogging layer comprises 100 parts by weight of a polymer and 5 parts by weight.
A polymer containing from about 200 parts by weight of a hydrophilic monomer and from 1 to 100 parts by weight of a surfactant, wherein the polymer and the hydrophilic monomer are crosslinked by electron beam irradiation. Fogging sheet. 3. The anti-fogging sheet according to claim 1, wherein said anti-fogging layer comprises 100 parts by weight of a polymer,
-200 parts by weight of a hydrophilic monomer, and 1 to 300 parts by weight of a crosslinkable monomer, comprising a composition containing 1 to 100 parts by weight of a surfactant, the polymer, the hydrophilic monomer and the crosslinkable An antifogging sheet characterized in that the monomer is crosslinked by electron beam irradiation. 4. The antifogging sheet according to claim 1, wherein said antifogging layer comprises 100 parts by weight of a polymer and 5 parts by weight.
-200 parts by weight of a hydrophilic crosslinkable monomer, comprising a composition containing 1 to 100 parts by weight of a surfactant, wherein the polymer and the hydrophilic crosslinkable monomer are cross-linked by electron beam irradiation. Characteristic anti-fog sheet. 5. The anti-fogging sheet according to claim 1, wherein said anti-fogging layer comprises 100 parts by weight of a polymer and 5 parts by weight.
-200 parts by weight of a hydrophilic monomer, 1 to 300 parts by weight of a hydrophilic crosslinkable monomer, and a composition containing 1 to 100 parts by weight of a surfactant, the polymer, the hydrophilic monomer and the An antifogging sheet, wherein the hydrophilic crosslinking monomer is crosslinked by electron beam irradiation. 6. The antifogging sheet according to claim 1, wherein said antifogging layer has a large number of hydrophilic groups on its surface and an interface capable of oozing out of said layer. An anti-fogging sheet comprising an activator. 7. The anti-fogging sheet according to claim 1, wherein the anti-fogging layer has a thickness of 0.5 to 3 mm.
An antifogging sheet having a thickness of 0 μm. 8. The antifogging sheet according to claim 1, wherein said antifogging layer is colored. 9. An anti-fogging sheet according to claim 1, further comprising an adhesive layer. 10. The antifogging sheet according to claim 1, wherein a printing layer is provided on the support layer film.